Automatic DNS Lookup vs Static IP for Discord.js Gateway Connections

Goal

Determine the most reliable method for a Discord.js v14 bot to connect to the Discord gateway while minimizing latency and ensuring continued connectivity during Discord’s IP rotation.

Constraints

1. The bot must maintain low connection latency, especially for high‑frequency message handling.
2. It should automatically adapt to Discord’s geo‑distributed gateway load balancing and IP changes.
3. TLS certificate validation must remain secure, avoiding global process‑wide overrides.

Unresolved Decision

Discord.js performs a DNS lookup of gateway.discord.gg on each shard via the underlying ws library, but developers can override this with the environment variable DISCORDJS_GATEWAY_HOST to a static IP or supply custom wsOptions for TLS control. The trade‑off between dynamic DNS resolution and a fixed IP address, and between default Node TLS validation and a custom rejectUnauthorized flag, remains unclear in terms of long‑term reliability and compliance.

Questions

• Will using DISCORDJS_GATEWAY_HOST to a static IP cause connection failures when Discord rotates gateway IPs, and how frequently does this rotation occur?
• Does providing wsOptions: { rejectUnauthorized: false } offer a safer alternative to setting NODE_TLS_REJECT_UNAUTHORIZED=0 for testing environments, and what are the security implications?
• Which approach—automatic DNS lookup or static IP—provides the best balance between latency and fail‑over resilience for production bots?